Apparatus for repairing pneumatic tires



J. FLYNN. APPARATUS FOR REPAIRING PNEUMATIC TIRES. I

APPLICATION FILED JULY 19,1920.

Patented Mar. 15, 1921.

UNITED STATES JOHN rum, or

AT T PF L (10., OF AKRON, OHIO, A CORPORATION OE OHIO. r

Specification of l' etters Patent.

APPARATUS FOR REPAIRING I' NEUMATIG TIRES.

Application filed m 19, 1920. Serial macaw.

- pairing Pneumatic Tires, which the fol lowing is a specification. v

My invention relates to improvements in apparatus designed forvulcanizing patches upon the exterior of the outer tubes, casings orshoes of double tube pneumatic tires, and is designed more particularlyfor making repairs on extra large casings which are commonly known asgiant truck tires. In such tires, owing to the extreme thickness of therubber covering, difliculty has been experienced in curing the rubber,the crust having a tendency to overcure while uncured or raw rubber is'left on the inside. 7

My invention aims to provide a construc tion in which the part to bevulcanized may be subjected to even or equal cure.

My invention further aims to provide an apparatus for makin repairson-tire shoes or casings in which either side of the casing ma besubjected to the proper temperature wit out affecting the other side, orboth sides and tread may be vulcanized at 'the same time as desired.

The invention also aims to provide a construction in which a part or allof the mold may be quickly cooled, and in which. also a plalrt of themold may be maintained cool .w e another part is heated to eifect thecure.

With these and other objects in view the invention includes the novelfeatures of construction and arrangement and combination of partshereinafter described and plarticularly ,defined by the appended '0 am.

An embodiment of the invention is i]lus-' I trated in theaccompanyingdrawings, in which? p I Figure 1 is a side elevation of my repairapparatus. 7

Fig; 2 is an end view.

Fig. 3 is a transverse section through the two mold-sections showing thesame separated, and

Fig. 4 is an inside face view of one of the sections.

Referring by reference characters to this 'which together form a rectanprojection which fits a corresponding seat in the top of the stand orsupport 1.

more, 01:10, sssrenea 'ro rnnwnmlms rooms? a ilurcmruav Patented Mar.15;,1a2i1. A

drawing the" numeral 1 designates suitable 'stand or support providedwith sup porting legs 1 between which is supported in any suitablemanner a steam generator or boiler, lndicated at 2. As' this boilerforms, per 86, no part of the present inven-' tion, it is only shownconventionally.

Remov'ably mounted upon this stand is a pair of mold sections 3 whichare duplicates of each otherland in detail in Figs. 3 and '4.

These are so shaped that "when laced in juxtaposition they form a'channe ed mold which are shown section with an inside face curved bothtransversely and longitudinally to conform to the exterior surface ofthe tire, The ad-.

joinin faces of the sections are preferably 'provi ed with registering Itongues and ooves as indicated at 3 and 3" respectively (Figs. 3 and 4).and the sections are secured together by bolts 4 passing through boltholes the 1ugs'3' which are fOIflId integral with the sections. v

The sections are further provided 'on' their lower faces with 'enlar'inents' 3 arr-boss or spaces through the T-couplings 7,1suitablevalves8 being provided by which the steam v, Y may be turned on or out off atwill. To the T-couplings 7 are also connected the pipes 9 which lead toa'source of cooling medium under requisite pressure,- such as cold waterfor example, and these." pipes are provided withfcut off valves 1()Drain or return pipes 11' lead from the bottoms of the chambers 3 to thelower part of the boiler, being provided with-cut oif valves 12, andthese pipes also which the cooling water may be drained oif,

' such branches having cutofi valves 14. In

order 'to apply requisite pressure to the inside of the casingundergoing vulcanization I provide the moldsections 3 with recesses 3 intheir upper outer edges which are .de-

yokes 15 sifgnedto be engaged by lugs 15 on the ends through which passpressure liave" branches 13 by I screws by means of which pressure maybe applied to the inside of the tire through the infidium of theordinary sand bag or the 1 e. Having thus described my invention, what Iclaim is:

1. A tire repair mold comprising a palr of arc-shaped sections adaptedwhen placed in contact with each other to provide an open tire receivingchannel, said sections having independent chambers in the opposite wallsthereof, means for supporting said mold with the open face of thechannel uppermost, and means for supplying heating and cooling media atwill to either of said chambers.

2. In combination, a suitable stand or support, a mold carrier therebyhaving a tire receivmg'ca'vity, said mold having independent chambers onopposite sides,- a stand supporting said sections, a boiler.supported bysaid stand, independent steam pipes leading from said boiler to saidchambers, independent drain pipes connected with said chambers, andlndependen't water supply pipes also connected with I ing said sectionstogether, and independent pipe connections to said chambers.

In testlmony whereof, I aflix my signa ture.

JOHN FLYNN.

